Roller bending-machine



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c. P. HIGGINS. ROLLER BENDING MACHINE.

No. 533,989. .Patented Peb. 12, 1895.

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CAMPBELL P. HIGGINS, OF ROSELLE, NEW JERSEY.

'ROLLER BNniNe-MACHINE.

PECIFICATION forming part of Lettersl Patent No. 533,989,6.ated February 12, 1895. Appuettiuniednmh13,1893. serai 110.465,838. (nomade.)

T0 vll zuh'om it mrtg/conceive.-

Be it known that I, CAMPBELL P. HIGGINS, a citizen of the United States, residing at Roselle, in the county of Union and State of.

New Jersey,- have invented certain new and useful Improvements in Roller Bending-Machines, of which the following isa specification. This invention relates to roller bendingmachines for rolling or warping metal plates into cylindrical form.

The invention consists in conjunction with a master roll, of'two subordinate rolls, one Aof which is fixed and adjusted,thelother automatically movable,'the latter being sustained against the work by means of a delinite yield'- ing pressure. l

'Said invention lfurther consists in certain variousnovel featuresof construction adapted for the embodimentfot` the said principle, and in order to enable others skilled in the art to which my invention appertains,to understand and use the same, I will proceed to describe its construction, explain its operation, land subsequently point out in vthe appended claims its novel characteristics. n

Referring to the accompanying drawings,

in which similar characters of reference indicate corresponding parts throughout the several viewsz-Figure 1 is a side elevation of the machine; Fig. 2, a plan view thereof; Fig. 3, an end View, exhibiting the roller-end of the machine; Fig. 4, an opposite end view, exhibiting the geared-end of the machine; Fig. 5, a transverse sectional viewtaken on the line Fig. 2; the machine being viewed endwise in the same direction as in Fig. 4; and Figs. 6, 7, 8, and 9, arev transverse sectional views through the rolls, showing dierent periods of operation, the machine being viewed endwise in a direction opposite to that in Fig. 5.

A represents the master roll, B an adjustable subordinate roll, and C the movable subordinate roll held by hydraulic pressure. All

said rolls are trunnioned at their inner'ends' while the master roll A is j ournaled in a sepa- Y rate frame F, which is made removable in I order to effect the insertion and removal of the ythe work between each operation.

The frames D, E, F, as well as the gear frame G, H, are placed upon longitudinal base bars I, J, which maybe readily removed, and bars of different lengths substituted when it is desired to substitute rolls A, B, C, of difterent lengths for bending various dimensions of work. p f y The master rollA is journaled in xed position. The subordinate roll B is adjustably fixed with reference to the roll A, according to the intended diameter of the work to be rolled. The'adjustment of said roll B is effected'by means of its movable journal boxes 1, fitting guideways in frames D, E, said boxes being provided with screw Shanks 2, which may be moved through the agency of the worm geared nuts 3, worms 4, and shafts 5, 6. The shafts 5, 6, are operated by a countershaft 7, through pinion R, spur 9, and clutches 10, 11, on the extremities of the independent central shaft 12. v

A The shaft7, may bedriven in the one direction or the other by the fast pulley 15, upon which may be shifted a director crossed belts respectively, from the loose pulleys 13,01- 14,

ythus moving the roller B up or down to the by pipes 23,/with hydraulic pressure, which for present purposes maybe connected with a hydraulic pressureaccumulator to atord a definite yielding pressure of the roll C, upon the master roll A.

Itis obvious that both the boxes of the subordinate rolls may bemounted on hydraulic cylinders, the roll C always being held against the roll A by maximum pressure sufficient to bend the edge of the plate, while the pressure exerted bythe roll B against the sheet could be varied at will. p

As clearly shown in Figs. 6, 7, 8 and 9, the rolls, B, C, 'are adjustably mounted so as to IOO approach the roll, A, in lines directly radial to the latter, and are arranged as closely together as is possible without an interference with a full movement of the roll, B, toward the roll, A. This arrangement of the rolls enables the shortest possible bight on the plate, K, to be secured, and the complete and proper bending of such plate at its edges to be thoroughly effected. It also enables the` plate to be bent into a curve of smaller radins than when a second feed-roll is interposed between the subordinate bending-rolls.

The master roll A is driven by means of its shaft 30, and aspur gear 31, mounted thereon, which is driven through the train of gearing 32, 33, 34, countershaft 35, and fast pulley 3S, upon which direct and crossed belts may be respectively shifted from loose pulleys 36 and 37, to reverse the bending rolls A, B, C, during their operation.

The movable roll C, receives its rotation from the shaft of the master roll A, through a yielding train of gearing 40, 4l, 42, 43, adapted to admit of the required motions Without interfering with the transmission. The gears 4l, 42, to this apparatus are pivoted in a link 44, swiveled on two other links 45, 46, pivoted on the driving and driven shafts.

The removable frame F, carrying the outer extremity of the master roll A, is moved off and on by means of a hydraulic cylinder 50, shown in dotted lines in Fig. 1, and also in Fig. 3, the saine carrying a plunger 5l, attached by yoke 52, to the said frame F, as also indicated by dotted lines in Fig. 1, and appearing in end View in Fig. 3. The frame F is pivoted on the yoke 52, so that it may be thrown down into a horizontal position asindicated in Fig. l, after being pushed oi the .journal of the roll A, so as to clear the Work.

The plate K is introduced to the rolls between A and B, and, as the edge comes down between the rolls A and C, the hydraulic pressure sustaining the roll C bends the extreme edge of the plate to the finished curvature of the drum. A further rotationof the roll A, bends the plate up into a cylindrical form until the lap K, with its double thickness, approaches B. The hydraulic pressure is then released from C, which allows the lap K to pass over B, without kinking the plate, and the lap K, after being broughtinto position directly between A and C, is again subjected tothe hydraulic pressure, so that both parts of the plate at the lap K, are bent to the desired curvature, forming an absolute contact between the two parts of the plate in the lap, and having the same curvature as the The diameter of the work is predetermined by the adjustment of the roll B, the roll C,

'being advanced upon the roll A, in the same position for all diameters of bending.

What I claim, and desire to secure by Letters Patent, is

1. In a roller bending-machine, the combination of one master-roll, and two subordinate bending-rolls, which latter rolls are movable to and from said master-roll and are arranged to approach the same in lines directly radial to the master-roll,substantially as and for the purposes specified. i

2. In a roller-bending machine, the combination of a fixed master-roll with two subordinate rolls, one of which latter is adjust-ably fixed and the other sustained against the work by predetermined hydraulic pressure, variable at will.

3. In a roller-bending machine, the combi nation of a master-roll, an adjustably fixed subordinate roll, a movable subordinate roll, movable journal boxes supporting the same, and hydraulic cylinders and pluugers connected to said boxes for the purposes described.

4. In a roller-bending machine, a movable housing for the top roll, in combination with the hydraulic cylinder for shifting said housing in and out of position for removable work.

CAMPBELL P. HIGGINS.

Witnesses:

NAT. W. PRATT, J. G. WARD. 

